html, body{
  width: 100%;
  height: 100%;
}
body{
  background-color: transparent;
  font: 14px/1.5 Helvetica,sans-serif,STHeiTi;
  color: #333;
  outline: 0;
}
img{
  vertical-align: bottom;
}
.fluid-img{
  width: 100%;
}
/*浮动工具类*/
.fl{
  float: left;
}
.fr{
  float: right;
}
/*清除浮动工具类*/
.clearfix::after{
  content: "";
  display: block;
  height: 0;
  visibility: hidden;
  clear: both;
}
.clearfix{
  *zoom:1;
}

/*自定义居中混合*/
.center(){
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.hCenter(){
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}
.vCenter(){
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

@nj-orange:#fd271b;